Iron(II) oxalate, $\text{FeC}_2\text{O}_4$, is oxidised in acid, with $\text{Fe}^{2+} \rightarrow \text{Fe}^{3+}$ and $\text{C}_2\text{O}_4^{2-} \rightarrow 2\text{CO}_2$. How many moles of electrons are lost when $0.30\ \text{mol}$ of it reacts completely?